Nonperturbative structure of the quark-gluon vertex

2003/03/20 by Jonivar Skullerud, J. I. Skullerud, P. O. Bowman +7 · 5 citations
Physics and Astronomy · #Fermion #Gauge (firearms) #Gauge theory #High-Energy Particle Collisions Research #Quantum Chromodynamics and Particle Interactions #Quantum and Classical Electrodynamics #Quantum chromodynamics #Quark #Tensor (intrinsic definition) #Vertex (graph theory) #Vertex function #hep-lat #hep-ph

paper · pdf · doi:10.1088/1126-6708/2003/04/047

published as JHEP 0304:047,2003 · 16 pages, 11 figures, JHEP3.cls

arxiv created 2003/03/20 · openalex publication_date 2003/04/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The complete tensor structure of the quark--gluon vertex in Landau gauge is determined at two kinematical points (`asymmetric' and `symmetric') from lattice QCD in the quenched approximation. The simulations are carried out at beta=6.0, using a mean-field improved Sheikholeslami-Wohlert fermion action, with two quark masses ~ 60 and 115 MeV. We find substantial deviations from the abelian form at the asymmetric point. The mass dependence is found to be negligible. At the symmetric point, the form factor related to the chromomagnetic moment is determined and found to contribute significantly to the infrared interaction strength.

Citations

• Infinite volume and continuum limits of the Landau-gauge gluon propagator
• Nonperturbative improvement and tree-level correction of the quark propagator
• The running coupling from the quark-gluon vertex

Cited by

• Aspects and consequences of a dressed-quark-gluon vertex
• Dyson-Schwinger equations: An instrument for hadron physics
• Confinement, DCSB, bound states, and the quark-gluon vertex
• Tracing masses of ground-state light-quark mesons
• Hadronic unquenching effects in the quark propagator